I just replaced my EVGA 9800GTX+ with an EVGA GT640(the two slot, 2G model) so I could run two monitors(DVI) and a Sony flat screen(HDMI) from the video card. Got the multiple monitor setup working for all three, aside from resolution differences between the three, everything seems to be working except the sound.
I use the onboard motherboard Realtek sound and it works fine. However, the Sony TV, which I assume is running off the GT640 audio won't work unless I disable the Realtek and make the Nvidia High Definition Audio(HDMI) the default sound system. Any way the Realtek can play through the GT640 card, disable the Nvidia Audio drivers or something?